Casting- machine



eta 22, 1929. 1. D. TRAVIS 1,732,449

CASTING MACHINE Filed June 15, 1928 3 $heets-Sheet Oct. 22, 1929. I. D. TRAVIS 1,732,449

CASTING MACHINE Filed June 15, 1928 5 Sheets-Sheet 2 gme'ntom 1r 13. Far/ls Oct. 22, 1929; I. D. TRAVIS CASTING MACHINE Filed June 15, 1928 I5 Sheets-Sheet 3 gin wanton .04 D 7/ 0/25 Patented on. 22, 1929 1,732,449

srares Parent oFFicE IRA D. TRAVIS, OF SALT LAKE CITY, UTAH CASTING MACHINE Application filed June 15, 1928. Serial No. 285,731.

My invention relates to permanent molds, complementary mold. Figure 11 is a secand has for its object to provide a new and tion 011 line 11 11 of Figure 5. Figure 12 eflicient mold for casting railway brake shoes. is a section on line 12-12 of Figure 4:. Fig

Afurther object is to provideamold which ure 13 is a section on line l313 of Figwill simplify and cheapen the production of me 3. 55

odd and unusual shaped castings and auto- The mold comprises two complementary matically eliminate them when they are sections, each of which is provided with one finished. or more protrusions on its front face. These A still further object is to provide a mold are so situated that they face depressions of of two complementary parts, one stationary similar shape and size in the opposite sec-. and the other movable, each of which is tion of the mold, so that when the mold is equipped with an automatic extractor for closed the protrusions of one portion fit into releasing the product when completed, and the depressions of the other, forming a block which mold can be opened, closed and adwithin which the form for the casting is justed to the exigencies of the casting operasituated, with the lower side of the depres- 6 tion by fluid pressure. sions and protrusions forming the top face A still further object is to provide a brass of the form in which the casting is made. shoe casting machine which will be economi- These protrusions, in turn, are made up of cal in construction, efficient in operation, two quite unequal elements each,.one stationand which will take precedence over the presary with respect to its section of the mold and cut process of sand casting. the other movable therein. The first is the These objects I accomplish with the device larger of the two and furnishes the bearing illustrated in the accompanying drawings, that supports the shaft of the eliminating in which similar numerals and letters of ref device, while the other is an essential part of erence indicate like parts throughout the the extractor proper. Thus it is evident several views and as described in the specifithat, although these protrusions are integral cation forming a part of this application parts of the molds, their primary function and pointed out in the appended claims. is to provide for the automatic removal of In the drawings, 1n which I have shown the finlshed castmgs. 30 the best and most preferred manner of huild- In the drawings I have shown the frame so ing my invention, Figure 1 is a side elevaupon which my machine is mounted as A, tion of my machine with the molds separated. with the fluid operated cylinder as B, and Figure 2 is a plan View of the same, Figure the two separate molds as C and D. A pis- 3 is a side elevation of the machine with the ten rod E connects the back side of the mold molds together for pouring. Figure i is a D with the fluid cylinder by which the mold front view of a section of one side of the mold, T) is moved to contact with and away from showing the position of the extractors and the mold G. Both of the molds are provided the general shape of the form therein. Figwith support blocks 1 and 2 on each side thereure 5 is a View of the complementary mold. of, with a portion of each block out and 40 Figure 6 is a side view of one of the extraccurved and on which blocks the molds are so tors. Figure 7 is a side view of a modified supported 011 the frame, either when upright form of constructing the same. Figure 8 or tilted to be cleaned. is a diagrammatic side view of one form of Each of the molds C and D are provided making the machine, showing the molds with depressions on the front face thereof y adapted to be tilted for placing cores therein and each is also provided with protrusions, and for the more convenient cleaning of the so that when placed together the protrusions face of the molds and the forms therein. in the one mold it into the depressions of Figure 9 is a front face view of a modified the opposite mold. The two molds, when form of constructing the molds for a series placed together, form the cavity into which of forms, parts cut away. Figure 10 is the the molten metal is poured to make the cast ing. The stationary mold C is provided with a single protrusion 5 on the front face thereof, and the movable mold D is provided with protrusions 6 and 7 adapted to engage with the protrusion 5 on each side thereof to form a block when fitted together. The form 8, into which the molten metal is poured, is made half in each mold with the lower side 9 of the protrusions 5, 6 and 7 when placed together, forming the top of the form, and with the mold D surrounding and comprising most of the form for the casting, with only half of the ends, half of the bottom of the form, one side and a part of the top, being in the mold C, and with the balance of the form being in the mold vD. The shape of V the castings made-may vary from that shown n the d-rawings, but the protrusions on each mold will be present in all cases.

This construction of the molds facilitates the automatic expulsion of the casting there 7 from, which is accomplished by two spaced apart extractors 9 andlO in themold D and one extractor 11 in the 'mold C for every casting forin'made' in each. Obviously each individual mold may contain several forms,

.thus making possible the production of a number of castings at each pouring. The

BXil-l'RCtOI'SQ and 10, andll are made, as

shown in the -.drawings-, with tapered shaft 12, havingan enlarged semi-spherical head 13 on thejnner end thereof and a nut 1 L 7 on the outer end; These shafts pass through hole-s in molds-C and D and are so that the heads 13 .35 1 depressions 16 in the side walls of form 8 placed fit into the semi-spherical when the molds are closed for pouring- IVhen in that position the back side of the head 13 forms a small portion of the wall of the mold cavity; A modified form of the eX-,

tractor may bemade with a conical head 13, as shown in Figure 7, adapted to fit into a conical shaped depression within the molds C and D. As may be seen, the shape of the tapered shaft 12 may vary from being tapered slightly to having the end 13 tapered and the balance of the shaft cylindrical. The nut 14 on the end of the shaft 12 is provided so that when the mold D ismoved from the mold G the mold will slide on the shafts 12 until thehead or nut 14 comes into contact with the back side of the mold, which ac- I tion will draw the heads 13 from the depressions 16 in the side walls of the form 8, drawing the finished casting therefrom, and the shafts 12 are susceptible of being so adjusted that the distance between the heads 13 will be greater than the width of the casting, thus insuring its complete release the moment it iswithdrawn from the mold cavity.

When the mold D is brought into contact with the mold C, the heads 13 fit into the "depressions 16 in the form 8, and the form is ready for pouring. Pouring V gates 17 are p d d i-Il the mol s, half in each mold,

with lateral holes 18 leading to the different forms in the molds through which the molten metal is poured to form the castings. The molds shown in Figures 1, 2, 3, at and 5 of the drawings are for two castings only, but it will be obvious that more castings could be made in each mold, as shown by Figure 6 of the drawings, in which more forms are shown.

Having thus described my invention, I desire to secure by Letters Patent and claim:

1. In a casting machine the combination of a frame having a fluid cylinder mounted on one end thereof, and a stationary mold section mounted on the other end; a movable mold sect-ion mounted between said cylinder and said stationary mold section, adapted to be moved to and from said stationary mold section by a piston rod operated by said cylinder; protrusions on said movable mold section; depressions in said stationary mold section adapted to be partially filled by said protrusions on the movable mold section with the rest of the space hollow to be filled by molten metal to form a casting; and extractors in said stationary mold section adapted to be moved by said movable mold section and to force the finished casting from the stationary mold section.

2. In a casting machine the combination of two mold sections, one stationary and the other movable, with a depression in the stationary mold section and a depression form and a. protrusion in the movable mold section, said protrusion adapted to fit into said depression in said movable mold section to partially fill it and thus make the rest of a. form for casting with the majority of it in the movable mold section; and spaced apart extractors carried within said mold sections adapted to be actuated by the movable mold section and to force the finished casting from the form in said stationary mold section.

3. In a casting machine the combination of two complementary mold sections, one of which is stationary and the other movable, with depressions and protrusions formed on the engaging faces of both mold sections; extractors mounted through said protrusions and with the end of said protrusions being formed by said extractors, with the protrusions fitting into similarly shaped depressions in the complementary mold sections, said extractors adapted to be actuated by the movement of the movable mold sections to draw the finished castings from the mold sections; and forms made in each mold section in which the molten metal is poured to produce the casting.

4. In a casting machine the combination of two complementary mold sections having depressions and protrusions formed on the front faces thereof, said depressions adapted to receive said protrusions when the mold sections are together; extractors mounted through said mold sections forming part of the protrusions and having the head thereof fitting into part of the depressions; and nuts formed on the back side of said extractors adapted to actuate said extractors When the movable mold section comes into contact therewith. r

5. In a casting machine the combination of complementary mold sections having depressions and protrusions formed on the engaging faces thereof, with extractors form ing part of the protrusions and fitting into said depressions, and with the bottom face of said depressions and protrusions forming the top side of the form into which the molten metal is poured to form the casting.

6. In a device of the class described the combination of two complementary mold sections; depressions and protrusions formed on the engaging faces thereof, with the depression of one mold section fitting into and filling the depression of the complementary mold section, and with the bottom face of said depressions and protrusions forming the top side of the form in which the casting is made; extractors carried in said protrusions with the heads thereof semi-spherical and fitting into similarly shaped depressions in the complementary mold section; a form made in said mold sections, having the major portion thereof formed in the movable mold section, into which the molten metal is poured to make the castings.

7. In a casting machine the combination of two complementary mold sections, one of which is movable and the other stationary, but adapted to be tilted; depressions and protrusions formed on the front faces of both mold sections; extractors mounted through said protrusions; semi-spherical heads on said extractors adapted to fit into similarly shaped depressions in the complementary mold section; and means to actuate said extractors by the movement of the movable mold section.

8. In a casting machine the combination of two complementary mold sections; extractors mounted through said mold sections to withdraw the finished castings when the mold sections are separated, said extractors having the shafts thereof tapered and the heads semi spherical in shape, with the heads adapted to fit into similarly shaped depressions in the complementary mold section.

9. In a casting machine the combination of two complementary mold sections, one stationary and the other longitudinally movable, each with compound depressions and protrusions, the protrusions of the movable mold section being adapted to fit into and partially fill the depressions in the stationary mold section, providing the rest of the form for casting with the majority of the form in the movable mold section; means to auto In testimony whereof I have affixed my signature.

IRA D. TRAVIS. 

